The palmtop is placed above the dash board. LED's are for illumination.
A closer look at the display.
The GPS. It acquires satellites effortlessly despites 2/3 of the sky is blocked.
The entire visible setup.
The box contains the radio and the Baycom modem and is placed under the driver's seat.
The heat sink contains the linear regulator to shield the radio and palmtop from possible voltage transient from the car battery.
The radio and the Baycom (in the static bag.)
The Baycom radio modem (1200 bps Audio Frequency Shift Keying)